EP 0135164 B1 19871111 - TRANSMISSION SYSTEM FOR HIGHER BIT RATE DIGITAL SIGNALS WITH AUXILIARY SIGNAL TRANSMISSION
Title (en)
TRANSMISSION SYSTEM FOR HIGHER BIT RATE DIGITAL SIGNALS WITH AUXILIARY SIGNAL TRANSMISSION
Publication
Application
Priority
DE 3330683 A 19830825
Abstract (en)
[origin: EP0135164A1] 1. A transmission system for high bit rate digital signals comprising intermediate regenerators and line terminal devices, each of which includes phase regulating loops with a clock generator (G), wherein, in order to form a transmission channel for additional signals (ZSE), at the transmitting end a phase modulation of the clock pulses for the outgoing digital signals takes place, in which the control input of a clock generator included in the transmitting-end line terminal device is supplied with the additional signals via an adder stage (AS), where the first input of the adder stage is connected to the output of a phase discriminator (PD1) included in the transmitting-end phase regulating loop, and the other input of the adder stage is connected to the input for the additional signals, where at the receiving end the additional signals are filtered out of the regulating voltage of the phase regulating loop of the receiving-end line terminal device, and where the intermediate regenerators are conductive in respect of the phase fluctuations, produced by the additional signals, of the digital signal pulses, characterised in that for the block-by-block recoding of the digital signals, the line terminal devices each comprise a transmitting-end and a receiving-end code converter and these code converters respectively include, between a receiving-end series-parallel converter (SP) and a transmitting-end parallel-series converter (PS), a recoding logic unit (UL) and an intermediate store (ZS) in a freely selectable sequence, that the additional signals are input-coupled into the transmitting-end code converter (CUS) via a pre-emphasis stage (PES), where the modulation frequency (fMOD ) at which occur the additional signals which are to be transmitted, corresponds at least approximately to the geometric mean between the cut-off frequency fg (CUS) of the narrow-band phase regulating loop in the transmitting-end code converter (CUS) and the cut-off frequency fg (REG) of the phase regulating loop of the following intermediate regenerators, that for the restoration of the additional signals the phase discriminator is included in a receiving-end code converter (CUE) and that the quality of the phase regulating loop in the two code converters (CUE, CUS) is substantially greater than in a transmission system which has no transmission channel for additional signals.
IPC 1-7
IPC 8 full level
H04B 17/00 (2006.01); H04J 9/00 (2006.01)
CPC (source: EP)
H04B 17/0087 (2013.01); H04J 9/00 (2013.01)
Citation (examination)
DE 2753420 A1 19790607 - SIEMENS AG
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0135164 A1 19850327; EP 0135164 B1 19871111; AT E30822 T1 19871115; DE 3330683 A1 19850314; DE 3467484 D1 19871217
DOCDB simple family (application)
EP 84109904 A 19840820; AT 84109904 T 19840820; DE 3330683 A 19830825; DE 3467484 T 19840820